Blood Type Genetics 15 January 2019 Do Now

Blood Type Genetics 15 January 2019

Do Now Fill out the table on blood types from two suspects and a victim. Suspect 1 Blood type Suspect 2 Victim A+ AB - O+ Anti A Anti B Anti D Antigens present Antibodies that can be made Visual of blood type test Types that they can donate to Types that they can receive from

Blood Typing Lab!

Genetics Refresher We have two versions – or alleles – of every gene. One inherited from our mom, one from our dad. The two alleles (genotype) interact to determine our trait (phenotype) in predictable ways. Some alleles are dominant, some are recessive. Dominant genes show their trait and ‘cover up’ recessive genes. ▪ IA (A) and IB (B) are dominant to i (O). ▪ D (+) is dominant to d (–) Some alleles are codominant. This means both alleles fully express their trait. ▪ IA and IB are codominant with each other.

Genotype to Phenotype What blood type will result from each genotype? 1. 2. 3. 4. 5. IAi. DD iidd IB IB Dd IA IB dd IB i. Dd A+ OB+ ABB+

Phenotype to Genotype What are the possible genotypes for each blood type? 1. 2. 3. 4. A+ ABOB+ IAIADD, IAi. DD, IAIADd, IAi. Dd IAIBdd iidd IBIBDD, IBi. DD, IBIBDd, IBi. Dd Other important vocab – Homozygous – both alleles for one gene are the same (e. g. ii) Heterozygous – the two alleles for one gene are different (e. g. Iai)

Punnett Squares are a tool for predicting the traits that will result from crossing certain genotypes.

Monohybrid (One gene) Crosses We do …. 1. Iai X ii 2. IBIB X Iai You do … 3. Dd X dd 4. IAIB X ii

Dihybrid (Two gene) Crosses We do … 1. IAi. Dd X ii. Dd 2. AB- X ii. DD You do … 3. IBi. Dd X IAi. DD 4. IAidd X IBi. Dd

Closure, Exit Ticket, HW Exit Ticket – Pick a blood type. For that type, list � Antibodies � Antigens � Blood typing test results � To whom can it donate? � From whom can it receive? � Genotype Homework– Homework sheet due next class. Major quiz in two classes.